She begs for it.

She must have been close to orgasm as she cried out almost right away, begging you to sire her first litter in her. You're not far behind, your orgasm is close, and you start to thrust harder, faster, pounding your cute partner for all your worth, wanting your own release, giving her what she's begging for.

You can feel a tickle in your balls, a familiar feeling you know means you are on the edge, about to cum. With one final strong thrust, sinking to the hilt, your hips press up against her ass cheeks, your crown pressed against her womb. Your cock fires and you groan as your orgasm washes over you. You fill Summer, ropes of seed jetting out of your cock, bathing her pussy in cum. Your barbs flare, locking your crown into her canal, ensuring that you fill her womb with your seed. Even locked in her, some still leaks past your cock, staining her thighs in your fertile spend.

"Fuck," you say as the last ropes are injected in her womb, "Haven't cum that hard in ages Tabs. Hope you wanted cubs cause you're getting mine." You leaning in to kiss and nuzzle her. Even as she admits she doesn't regret this, you whisper to her. "I'm not done yet Tabs. You have an entire week of heat, and I'm going to fuck you until you can't wag that cute tail, till you lay in my bed between fucks, unable to move, cum dripping from your pussy." You smile, "I'm going to claim you Tabs. This tom is going to collar his queen, no males will touch you when I'm done with you. Only cock you'll get is mine, fucking litter after litter into you."